<?php

class Post extends CActiveRecord
{
	/**
	 * The followings are the available columns in table 'tbl_post':
	 * @var integer $id
	 * @var string $title
	 * @var string $content
	 * @var string $tags
	 * @var integer $status
	 * @var integer $create_time
	 * @var integer $update_time
	 * @var integer $author_id
	 * @var string $filename 
	 * @var integer $category_id
      	 * @var bit $isNews
	 */
	const STATUS_DRAFT=1;
	const STATUS_PUBLISHED=2;
	const STATUS_ARCHIVED=3;

	private $_oldTags;

	public $image;
	
	/**
	 * Returns the static model of the specified AR class.
	 * @return CActiveRecord the static model class
	 */
	public static function model($className=__CLASS__)
	{
		return parent::model($className);
	}

	/**
	 * @return string the associated database table name
	 */
	public function tableName()
	{
		return '{{post}}';
	}

	/**
	 * @return array validation rules for model attributes.
	 */
	public function rules()
	{
		// NOTE: you should only define rules for those attributes that
		// will receive user inputs.
		$rules = array(
			array('title, content, status', 'required'),
			array('status', 'in', 'range'=>array(1,2,3)),
			array('title', 'length', 'max'=>128),
			array('tags', 'match', 'pattern'=>'/^[\w\s,]+$/', 'message'=>'Tags can only contain word characters.'),
			array('tags', 'normalizeTags'),
			array('image', 'file', 'types'=>'jpg, gif, png', 'allowEmpty' => true),
			
			array('title, status', 'safe', 'on'=>'search'),
			array('image,  category_id, intro, isNews', 'safe'),
		);
                
                foreach (Yii::app()->params->otherLanguages as $k => $v) {
                        $rules[] = array('title_'.$k, 'safe');
                        $rules[] = array('content_'.$k, 'safe');
                        $rules[] = array('intro_'.$k, 'safe');
                }
                return $rules;
        }

	/**
	 * @return array relational rules.
	 */
	public function relations()
	{
		// NOTE: you may need to adjust the relation name and the related
		// class name for the relations automatically generated below.
		return array(
			'author' => array(self::BELONGS_TO, 'User', 'author_id'),
			'comments' => array(self::HAS_MANY, 'Comment', 'post_id', 'condition'=>'comments.status='.Comment::STATUS_APPROVED, 'order'=>'comments.create_time DESC'),
			'commentCount' => array(self::STAT, 'Comment', 'post_id', 'condition'=>'status='.Comment::STATUS_APPROVED),
			'category' => array(self::BELONGS_TO, 'Category', 'category_id'),
                        'i18nPost' => array(self::HAS_MANY, 'PostLang', 'post_id', 'on'=>"i18nPost.lang_id='".Yii::app()->language."'", 'index'=>'lang_id'),
                        'multilang' => array(self::HAS_MANY, 'PostLang', 'post_id', 'index' => 'lang_id'),                  
		);
	}
        
        public function behaviors() {
            return array(
                'ml' => array(
                'class' => 'application.components.behaviors.MultilingualBehavior',
                'primaryLang' => Yii::app()->language, //your main language
                'languages' => Yii::app()->params->otherLanguages, //your translated languages
                'localizedAttributes' => array('title', 'content', 'intro', 'slug'),
                'relName1' => 'i18nPost',
                'relName2' => 'multilang',
                ),
                
                'image'=>array(
                    'class'=>'image.components.ImgRecordBehavior',
                    'attribute'=>'imageId', // default value
                ),
                
                'SlugBehavior' => array(
                    'class' => 'application.components.behaviors.SlugBehavior',
                    'slug_col' => 'slug',
                    'title_col' => 'title',
                    'max_slug_chars' => 128,
                    'overwrite' => true
                )
            );
        }
        
        public function localized() {
            $this->getDbCriteria()->mergeWith(array(
                'with'=>array(
                'i18nPost'=>array(),
                'category'=>array('scopes'=>array('localized')),
                ),
            ));
            return $this;
        }
        
        public function __get($name) {
            try { return parent::__get($name); } 
            catch (CException $e) {
                if ($this->hasLangAttribute($name)) return $this->getLangAttribute($name);
                else throw $e;
            }                                                     
        }

        public function __set($name, $value) {
            try { parent::__set($name, $value); } 
            catch (CException $e) {
                if ($this->hasLangAttribute($name)) $this->setLangAttribute($name, $value);
                else throw $e;
            }                                     
        }

	/**
	 * @return array customized attribute labels (name=>label)
	 */
	public function attributeLabels()
	{
		return array(
			'id' => 'Id',
			'title' => 'Title',
			'filename' => 'File Name',
			'content' => 'Content',
			'tags' => 'Tags',
			'status' => 'Status',
			'create_time' => 'Create Time',
			'update_time' => 'Update Time',
			'author_id' => 'Author',
			'category' => 'Category',
                        'isNews' => 'E Noutate',
		);
	}

	/**
	 * @return string the URL that shows the detail of the post
	 */
	public function getUrl()
	{
		return Yii::app()->createUrl('post/view', array(
                    'id'=>$this->id,
                    'title'=> $this->slug == '' ? str_replace(" ", "-", $this->title) : $this->slug,
		));
	}

	/**
	 * @return array a list of links that point to the post list filtered by every tag of this post
	 */
	public function getTagLinks()
	{
		$links=array();
		foreach(Tag::string2array($this->tags) as $tag)
			$links[]=CHtml::link(CHtml::encode($tag), array('post/index', 'tag'=>$tag));
		return $links;
	}

	/**
	 * Normalizes the user-entered tags.
	 */
	public function normalizeTags($attribute,$params)
	{
		$this->tags=Tag::array2string(array_unique(Tag::string2array($this->tags)));
	}

	/**
	 * Adds a new comment to this post.
	 * This method will set status and post_id of the comment accordingly.
	 * @param Comment the comment to be added
	 * @return boolean whether the comment is saved successfully
	 */
	public function addComment($comment)
	{
		if(Yii::app()->params['commentNeedApproval'])
			$comment->status=Comment::STATUS_PENDING;
		else
			$comment->status=Comment::STATUS_APPROVED;
		$comment->post_id=$this->id;
		return $comment->save();
	}

	/**
	 * This is invoked when a record is populated with data from a find() call.
	 */
	protected function afterFind()
	{
		parent::afterFind();
		$this->_oldTags=$this->tags;
	}

	/**
	 * This is invoked before the record is saved.
	 * @return boolean whether the record should be saved.
	 */
	protected function beforeSave()
	{
		if(parent::beforeSave())
		{
			if($this->isNewRecord)
			{
				$this->create_time=$this->update_time=time();
				$this->author_id=Yii::app()->user->id;
			}
			else
				$this->update_time=time();
			return true;
		}
		else
			return false;
	}

	/**
	 * This is invoked after the record is saved.
	 */
	protected function afterSave()
	{
		parent::afterSave();
		Tag::model()->updateFrequency($this->_oldTags, $this->tags);
	}

	/**
	 * This is invoked after the record is deleted.
	 */
	protected function afterDelete()
	{
		parent::afterDelete();
		Comment::model()->deleteAll('id='.$this->id);
		Tag::model()->updateFrequency($this->tags, '');
	}

	/**
	 * Retrieves the list of posts based on the current search/filter conditions.
	 * @return CActiveDataProvider the data provider that can return the needed posts.
	 */
	public function search()
	{
		$criteria=new CDbCriteria;

		$criteria->compare('title',$this->title,true);

		$criteria->compare('status',$this->status);

		return new CActiveDataProvider('Post', array(
			'criteria'=>$criteria,
			'sort'=>array(
				'defaultOrder'=>'status, update_time DESC',
			),
		));
	}
        
        public function getLatestNews($limit=5)
	{
		return $this->localized()->findAll(array(
			'condition'=>'status='.self::STATUS_PUBLISHED.' AND isNews IS NOT NULL AND isNews <> \'\'',
			'order'=>'create_time DESC',
			'limit'=>$limit,
		));
	}
        
        public function getLatestArticles($limit=5)
	{
		return $this->localized()->findAll(array(
			'condition'=>'status='.self::STATUS_PUBLISHED.' AND isNews IS NULL OR isNews = \'\'',
			'order'=>'create_time DESC',
			'limit'=>$limit,
		));
	}
}